Class: God::CLI::Run

Inherits:
Object
  • Object
show all
Defined in:
lib/god/cli/run.rb

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ Run

Returns a new instance of Run.



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# File 'lib/god/cli/run.rb', line 5

def initialize(options)
  @options = options

  dispatch
end

Instance Method Details

#attach ⇒ Object 



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# File 'lib/god/cli/run.rb', line 27

def attach
  process = System::Process.new(@options[:attach])
  Thread.new do
    loop do
      unless process.exists?
        applog(nil, :info, "Going down because attached process #{@options[:attach]} exited")
        exit!
      end
      sleep 5
    end
  end
end

#default_run ⇒ Object 



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# File 'lib/god/cli/run.rb', line 40

def default_run
  # make sure we have STDIN/STDOUT redirected immediately
  setup_logging

  # start attached pid watcher if necessary
  if @options[:attach]
    self.attach
  end

  if @options[:port]
    God.port = @options[:port]
  end

  if @options[:events]
    God::EventHandler.load
  end

  # set log level, defaults to WARN
  if @options[:log_level]
    God.log_level = @options[:log_level]
  else
    God.log_level = @options[:daemonize] ? :warn : :info
  end

  if @options[:config]
    if !@options[:config].include?('*') && !File.exist?(@options[:config])
      abort "File not found: #{@options[:config]}"
    end

    # start the event handler
    God::EventHandler.start if God::EventHandler.loaded?

    load_config @options[:config]
  end
  setup_logging
end

#dispatch ⇒ Object 



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# File 'lib/god/cli/run.rb', line 11

def dispatch
  # have at_exit start god
  $run = true

  if @options[:syslog]
    require 'god/sys_logger'
  end

  # run
  if @options[:daemonize]
    run_daemonized
  else
    run_in_front
  end
end

#load_config(config) ⇒ Object 



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# File 'lib/god/cli/run.rb', line 142

def load_config(config)
  files = File.directory?(config) ? Dir['**/*.god'] : Dir[config]
  abort "No files could be found" if files.empty?
  files.each do |god_file|
    unless load_god_file(god_file)
      abort "File '#{god_file}' could not be loaded"
    end
  end
end

#load_god_file(god_file) ⇒ Object 



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# File 'lib/god/cli/run.rb', line 152

def load_god_file(god_file)
  applog(nil, :info, "Loading #{god_file}")
  load File.expand_path(god_file)
  true
rescue Exception => e
  if e.instance_of?(SystemExit)
    raise
  else
    puts "There was an error in #{god_file}"
    puts "\t" + e.message
    puts "\t" + e.backtrace.join("\n\t")
    false
  end
end

#run_daemonized ⇒ Object 



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# File 'lib/god/cli/run.rb', line 83

def run_daemonized
  # trap and ignore SIGHUP
  Signal.trap('HUP') {}
  # trap and log-reopen SIGUSR1
  Signal.trap('USR1') { setup_logging }

  pid = fork do
    begin
      require 'god'

      # set pid if requested
      if @options[:pid] # and as deamon
        God.pid = @options[:pid]
      end

      default_run

      unless God::EventHandler.loaded?
        puts
        puts "***********************************************************************"
        puts "*"
        puts "* Event conditions are not available for your installation of god."
        puts "* You may still use and write custom conditions using the poll system"
        puts "*"
        puts "***********************************************************************"
        puts
      end

    rescue => e
      puts e.message
      puts e.backtrace.join("\n")
      abort "There was a fatal system error while starting god (see above)"
    end
  end

  if @options[:pid]
    File.open(@options[:pid], 'w') { |f| f.write pid }
  end

  ::Process.detach pid

  exit
end

#run_in_front ⇒ Object 



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# File 'lib/god/cli/run.rb', line 77

def run_in_front
  require 'god'

  default_run
end

#setup_logging ⇒ Object 



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# File 'lib/god/cli/run.rb', line 127

def setup_logging
  log_file = God.log_file
  log_file = File.expand_path(@options[:log]) if @options[:log]
  log_file = "/dev/null" if !log_file && @options[:daemonize]
  if log_file
    puts "Sending output to log file: #{log_file}" unless @options[:daemonize]

    # reset file descriptors
    STDIN.reopen "/dev/null"
    STDOUT.reopen(log_file, "a")
    STDERR.reopen STDOUT
    STDOUT.sync = true
  end
end